Download a file with an AsyncTask

Issue

I tried using many codes I've found for downloading files with an AsyncTask with no success yet. I get an error on the logcat: E/Error:: No such file or directory. Despite looking for solutions for this error, couldn't find What's missing or wrong.

This is the doInBackground method in which I assume something is missing/wrong:

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    new DownloadJSON().execute("http://api.androidhive.info/json/movies.json");
}

protected String doInBackground(String...fileUrl) {
        int count;
        try {
            String root = "data/data/com.example.jsonapp2";

            URL url = new URL(fileUrl[0]);

            URLConnection connection = url.openConnection();
            connection.connect();

            // input stream to read file - with 8k buffer
            InputStream input = new BufferedInputStream(url.openStream(), 8192);

            File fileName = new File(root+"/movies.json");
            boolean existsOrNot = fileName.createNewFile(); // if file already exists will do nothing

            // Output stream to write file

            OutputStream output = new FileOutputStream(fileName,false);
            byte data[] = new byte[1024];

            System.out.println("Downloading");
            long total = 0;
            while ((count = input.read(data)) != -1) {
            total += count;

            // writing data to file
            output.write(data, 0, count);
        }
            // flushing output
            output.flush();
            // closing streams
            output.close();
            input.close();
        } catch (Exception e) {
            Log.e("Error: ", e.getMessage());
        }
        return null;
    }

Thanks.

Didn't want to bombard with redundant code. If some other code is needed, I'd love to provide it.

Solution

UPDATED ANSWER

this is working for me, write file in local storage and read it again on method PostExecute

class DownloadJSON extends AsyncTask<String, Void, Void>{

        String fileName;
        String responseTxt;
        String inputLine;
        String folder;

        @Override
        protected Void doInBackground(String... strings) {
            try {
                String root = "data/data/com.example.jsonapp2";
                URL url = new URL(strings[0]);
                HttpURLConnection urlConnection = (HttpURLConnection)url.openConnection();
                //Set methods and timeouts
                urlConnection.setRequestMethod("GET");
                urlConnection.setReadTimeout(15000);
                urlConnection.setConnectTimeout(15000);

                urlConnection.connect();

                //Create a new InputStreamReader
                InputStreamReader streamReader = new
                        InputStreamReader(urlConnection.getInputStream());
                BufferedReader reader = new BufferedReader(streamReader);

                StringBuilder response  = new StringBuilder();

                //Check if the line we are reading is not null
                while((inputLine = reader.readLine()) != null){
                    response.append(inputLine);
                }

                //Close our InputStream and Buffered reader
                reader.close();
                streamReader.close();

                responseTxt = response.toString();

                Log.d(TAG, "doInBackground: responseText " + responseTxt);

                // PREPARE FOR WRITE FILE TO DEVICE DIRECTORY
                FileOutputStream fos = null;
                fileName = "fileName.json";
                folder = fileFolderDirectory();

                try {
                    fos = new FileOutputStream(new File(folder + fileName));
                    //fos = openFileOutput(folder + fileName, MODE_PRIVATE);
                    fos.write(responseTxt.getBytes());
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if(fos != null){
                        fos.close();
                    }
                }


            } catch (Exception e) {
                Log.e("Error: ", e.getMessage());
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void aVoid) {
            super.onPostExecute(aVoid);

            // -- THIS METHOD IS USED TO ENSURE YOUR FILE AVAILABLE INSIDE LOCAL DIRECTORY -- //

            FileInputStream fis = null;
            try {
                fis = new FileInputStream(new File(folder +fileName));
                InputStreamReader isr = new InputStreamReader(fis);
                BufferedReader br = new BufferedReader(isr);
                StringBuilder sb = new StringBuilder();
                String text;

                while ((text = br.readLine()) != null) {
                    sb.append(text).append("\n");
                }

                Toast.makeText(TestActivity.this, "result " + sb.toString(), Toast.LENGTH_SHORT).show();

            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                try {
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

ops, almost forget this method

public static String fileFolderDirectory() {
        String folder = Environment.getExternalStorageDirectory() + File.separator + "write_your_app_name" + File.separator;
        File directory = new File(folder);
        if(!directory.exists()){
            directory.mkdirs();
        }
        return folder;
    }

Answered By - Nanda Z